You can use this word for anything, it can mean yes or no or just an answer because you cannot be bothered making up anytbing more elaborate. It can piss people off, it can amke them happy all in all it seems to be a pretty great word.

Q: Are you horny?
A: Maybe (Yes)
Q: Can I get that nice new 500 dollar bike for my birthday?
A: Maybe (No)
Q: How much wood could a woodchuck chuck if a woodchuck could chuck wood?
A: Maybe (Nonsense)

Guy: Would you want to have sex with me?
Girl: Maybe (NO)
Guy: hmm..
Girl: You wanna see a play at the theater?
Guy: Maybe (thinking there might be a chance for sex, but unsure if seeing a play is worth it)